一种新的认知无线电频谱感知方法

Spectrum Sensing in Cognitive Radio

认知无线电是一种用于提高无线电通信频谱利用率的新的智能技术。首先简述了认知无线电的背景和概念,然后针对认知无线电频谱感知的能力,对比分析了现有的三种频谱检测方法:匹配滤波器法、能量检查法和循环平稳特征检测法,在对其进行研究的基础上,提出一种将能量检测法和循环平稳特征检测法相结合的双门限检测法,通过仿真验证了该方法的有效性和优越性。

Cognitive radio （CR） is viewed as a novel approach for improving the utilization of a precious natural resource,that is,the radio electromagnetic spectrum. This paper first gives an overview of the background and concept for CR,then focuses on spectrum sensing. The paper investigates three techniques of spectrum sensing,including matched filtering,energy detection and cyclostationary feature detection,finally,this paper describes a double-threshold detection method,which integrates both energy detection and cyclostationary feature detection.The simulation results and analysis indicate its efficiency and effectiveness.